144280069 has 4 divisors (see below), whose sum is σ = 144581760. Its totient is φ = 143978380.

The previous prime is 144280051. The next prime is 144280099. The reversal of 144280069 is 960082441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144280069 - 2⁹ = 144279557 is a prime.

It is a super-2 number, since 2×144280069² = 41633476621289522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144280039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150127 + ... + 151084.

It is an arithmetic number, because the mean of its divisors is an integer number (36145440).

Almost surely, 2^144280069 is an apocalyptic number.

It is an amenable number.

144280069 is a deficient number, since it is larger than the sum of its proper divisors (301691).

144280069 is an equidigital number, since it uses as much as digits as its factorization.

144280069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301690.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 144280069 is about 12011.6638730860. The cubic root of 144280069 is about 524.4878682328.

The spelling of 144280069 in words is "one hundred forty-four million, two hundred eighty thousand, sixty-nine".